S&P 500 Starts H2 With Correction Concerns and AI Euphoria
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Key Takeaways
- The S&P 500 delivered a return of 7.5% in the first half of 2026, while analysts are increasingly warning of correction risks for the second half.
- The Shiller CAPE ratio is at historically high levels, and expected earnings growth rates are viewed by market observers as unsustainable.
- AI and technology stocks continue to be driven by FOMO sentiment, with their valuations remaining contested among investors.
- Defensive strategies including ETF-based structures and the ABL rule are gaining importance for capital protection.
- A ceasefire agreement between the U.S. and Iran led to firm crude oil prices, while the euro remained stable against the dollar.
The S&P 500 closed the first half of 2026 with a gain of 7.5%, according to current market data from June 29, 2026. Despite the positive performance, analysts are increasingly warning of a correction in the second half of the year.
Correction Risks Rise in Second Half
According to Seeking Alpha from June 29, 2026, risks for the broad-based U.S. stock index are rising in the second half. Analysts point to elevated valuation levels: the Shiller CAPE ratio—a long-term metric for stock market valuation that compares the current price of an index to average inflation-adjusted earnings over the past ten years—is moving at historically high levels.
Expected earnings per share growth rates for the coming quarters appear unsustainable in the view of market observers. An analysis of earnings expectations from June 29, 2026 shows skepticism toward projected EPS growth rates for the coming quarters.
AI Euphoria Continues to Drive Valuations
While correction concerns mount, sentiment around artificial intelligence and related technology stocks remains positive. According to a market commentary from June 29, 2026, AI and AI-adjacent stocks continue to be driven by FOMO sentiment—fear of missing out. The question of whether valuations for these narratives are justified long-term remains contested among investors.
The weekly market report emphasizes that AI stocks are significantly shaping market performance. This concentration in a few technology stocks raises questions for some investors about the breadth of market gains.
Defensive Strategies Gain Importance
Given the uncertainty, retail investors are seeking ways to protect their capital. An analysis published on Seeking Alpha on June 29, 2026 describes five ways to protect capital in the event that the two major U.S. ETFs SPY (SPDR S&P 500 ETF Trust) and QQQ (Invesco QQQ Trust, which tracks the Nasdaq-100) fall.
The strategies include the so-called ABL rule (Asset-Based Lending)—an approach to capital protection—as well as ETF-based defensive structures. Additionally, a simplified two-ETF portfolio is proposed that aims for more stable returns.
Geopolitical Developments in Focus
Beyond fundamental valuation questions, investors are also monitoring geopolitical developments. On June 29, 2026, the U.S. and Iran agreed to a new ceasefire in the Middle East after previous agreements had failed. The news led to firm crude oil prices and interest rates, while the U.S. dollar moved within its previous trading ranges.
For investors in the DACH region invested in U.S. stocks, currency risk remains an important factor. The euro showed stability against the dollar on June 29, 2026, which had little impact on the returns of S&P 500 investments from the perspective of European investors.
Outlook for More Volatile Months
The combination of high valuations, concentrated market leadership by tech stocks, and geopolitical uncertainties is leading market observers to act with heightened caution for the second half of 2026. Whether correction concerns materialize or the AI-driven rally continues will become clear in the coming months.
For retail investors, analysts recommend preparing portfolios for potential volatility and reviewing diversification strategies. Whether defensive ETF strategies or a mix of bonds—options for risk management are diverse.